Fuel injection method for IC engines generates fuel spray jet with central jet section of low concentration and outer section with high concentration, wide spray angle, and peripheral area with small concentration and small angle

摘要

A fuel injection unit (10) generates a fuel spray jet (15), which has a central jet section with low concentration, and an outer jet section. The outer section is formed to have an area (18) with high concentration and wider spray angle, and a peripheral area (19) with average concentration and small spray angle. The spray jet has a flat cohesive shape. There is one fuel injection unit for two intake valves (3a) of a cylinder. The spray jet area with high concentration is directed onto an inner wall (14B) opposite to another inner wall (14A), in which the fuel injection valve is located. The complete spray jet is directed symmetrically onto a central dividing wall between the valves.